Copyright (c) 1994
     The Regents of the University of California.  All rights reserved.
 Copyright (c) 1994, 1995, 1996
	Keith Bostic.  All rights reserved.
 Copyright (c) 2011
	Zhihao Yuan.  All rights reserved.

 The vi program is freely redistributable.
 You are welcome to copy, modify and share it with others
 under the conditions listed in the LICENSE file.
 If any company (not individual!) finds vi sufficiently useful
 that you would have purchased it, or if any company wishes to
 redistribute it, contributions to the authors would be appreciated.